Last



Patented Mar. 10, 1925.

l GEORGE CLAUSING, OF PORTSMOUTH, PANY, 0F PORTSMOUTH,

o-Hro, .essieu-oa To THE vULcAN LAST com; omo, n conronnfrrou or omo.

LAST.

Application filed March-26, 1924. Serial No. 701,988.v

To all whom it may concer/n.:

Be it known that I, Gru-onor. CLaUsrNe.- a citizen of the United States, residing at Portsmouth, in the county of Scioto and State of Ohio, have invented certain new and useful Improvements inLasts, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to lasts. The object of my invention is to provide a last of simple. and strong construction v which will maintain its position in either i expanded or collapsed condition.

In particular it is my object to provide a last in which the spring links may be more readily flexed by a system et levers in connection with the links.

Referring to the drawings:

Figure 1 is a section of the last showing the link and leverage arrangement when the last is in expanded position.

Figure 2 is a similar view of the last in its collapsed position.

Referring to the drawings in detail:

1 is the heel which has a substantially vertical forward face 2 and a rearwardly directed forward face 3, which is located at an angle to the vertical face and also at an angle to the rear vertical face 4 of the toe part 5. 'Ihe heel part has a cutaway section 6 and the toe part has a cutaway portion 7 which are adjacent to one another, having their open ends communicating and alsov communicating with the faces 3 and 4. A portion of the rear face 4 of the toe part adjoins and abuts the front :tace 2 of the heel part when the parts are in expanded position, while the faces 3 and 4 are in abutment when the parts are in collapsed position.

Any form of hinged joint may be provided, but I prefer the semicircular projection 8 itting into the corresponding semicircular depression 9. It is preferred that the periphery of this projection describe more than an are of 18() degrees.

Anchor pins 10 and 11 are transversely mounted in the toe and heel parts respectively. Upon these pins are mounted angular links or plates which consist of vertical portions 12 and downwardly extending laterally directed portions 13. The free end of the portion 13 is riveted at 14 to the lower end of the portion 12 of the link or plate. These links are made of steel and are somewhat resilient and by their arrangement' a multiplication of force is secured through the leverage developed. The pins are so mounted that a line draw'n betweentheir centers is below the point about which the points pivot when the parts are in expanded position. This line moves over this pivotal point or dead center, which is designated approximately 15, when the parts move to collapsed position.

When the parts pass over the dead center the links are flexed and the liexlin'g is multiplied by the leverage secured. It will be obvious that the line between the centers of the pins 10 and 11 will tend to grow longer when the parts pass over dead center and to compensate for this the links must yield. The lever portions 12 assist in this compensation.

I desire to comprehend within my invention such modifications as may be necessary to adapt it to varying conditions.

Having thus fully described my invention, what I claim as new and desirelto secure by Letters Patent, is:

1. In a last, a toe part, a heel part, means permitting said parts to rock with respect to one another, pins mounted in the respective parts, links mounted on said pins, said links consisting of L-shaped bodies having substantially vertical portions and laterally and downwardly extendingv portions, the end of one laterally and downwardly yextending portion being connected to the bottom of the other vertical portion.

2. In a last, a heel part, a toe part, and means permitting said parts to pivot with respect to one another, pins transversely mounted in said respective parts, links mounted on said pins, a portion of said links extending downwardly from the pin on which it is mounted and another portion extending to a point adjacent the bottom of the other downwardly extending portion of the other link and fastened thereto.

3. In a last, a heel part, a toe part, means for pivoting said parts one on the other, means for connecting links to said parts, yielding links mounted on said connecting means, and means for attaching the free ends of said links to one another and maintaining said attached ends at points below said connecting means, whereby a spring lock is effected between the toe and heel parts.

CII

4; Inzzt last, lwheel part,l and a toe part so arranged as to lnuove ivvitl'iy respect to one another from collapsed to expanded posi? tion and moe-versa, links :connecting sandv parts, each linkA consistingof'a Vertiozt'l 'portion pivoted on'one of said' llst parts' and portion Vwhich passes tothe other last part,

said last named link portion being connected to the vertical portion of thelink attached to the other of said last parts below `the point of their gc'ro'ssin'g each other.

s'o arranged 'as to pivot with respect to oneI other 'in lmoving from 'col-lapsedto eX- link below the point of theirfciss'ing*each othQITQthe points "of fpiif'oti'ngfsaid vlinks bethem Will pass .over the/.dead ycenter When v`said. last -parts 'nove y'freineone."fposition to theother.

6. In a, last, a heel part, a toev part, means o'r Vpivoting "said )parts one y'on the other, links' connec'tmg said parts, means for mounting said links in said last parts and levers associated with said links to ileX said ylinks when the ports pass over desidpcenter.`

77. In a last7 ay h^eel part and a toe part of resilient material74 means orlpivoting :said .pztrts one on the other,` links connecting Vsaid fpiarts, leversconne'cted Withjsaidlinks and `means for inounting'sztid links 4and -lefrztnged'that the material between thepoints of connection of the flinks-and--lfevers 'tothe ylast parts will be compressed 'when isfaid parts pass over dead center.

In testimony whereof, -I r'aflix Vlny'signal y-eEoRGEp oni/msme. 

